I can relate. My ex didnt just stalk me he got his best friend to stalk me too. His friend lived on my street.
My ex would phone me up saying things like "i know where you are. You got in a red car with a ginger haired woman"
He would phone me over 60 times in the middle of the night saying that he took an overdose.
He barged into my house and ran into my bedroom looking for evidence that i had an intimate relationship with any one.
His friend followed me all the time. I had my electric and gas cut.
It was really horrible and inbearable. I ended up moving to another city because i felt like i was loosing my mind.
Have you thought about getting a restraining order?